Add helpers for header title and sidebar, and move setting those from controllers to layouts.

app/assets/javascripts/dispatcher.js.coffee

@@ -8,7 +8,6 @@ class Dispatcher
   initPageScripts: ->
     page = $('body').attr('data-page')
-    project_id = $('body').attr('data-project-id')
     unless page
       return false

app/controllers/admin/application_controller.rb

@@ -3,15 +3,9 @@
 # Automatically sets the layout and ensures an administrator is logged in
 class Admin::ApplicationController < ApplicationController
   before_action :authenticate_admin!
-  before_action :set_title
+  layout 'admin'
   def authenticate_admin!
     return render_404 unless current_user.is_admin?
   end
-
-  def set_title
-    @title      = "Admin area"
-    @title_url  = admin_root_path
-    @sidebar    = "admin"
-  end
 end

app/controllers/application_controller.rb

@@ -3,6 +3,7 @@ require 'gon'
 class ApplicationController < ActionController::Base
   include Gitlab::CurrentSettings
   include GitlabRoutingHelper
+  include PageLayoutHelper
   PER_PAGE = 20

app/controllers/dashboard/application_controller.rb

 class Dashboard::ApplicationController < ApplicationController
-  before_action :set_title
-
-  private
-
-  def set_title
-    @title      = "Dashboard"
-    @title_url  = root_path
-    @sidebar    = "dashboard"
-  end
+  layout 'dashboard'
 end

app/controllers/explore/application_controller.rb

 class Explore::ApplicationController < ApplicationController
-  before_action :set_title
-
-  private
-
-  def set_title
-    @title      = "Explore GitLab"
-    @title_url  = explore_root_path
-    @sidebar    = "explore"
-  end
+  layout 'explore'
 end

app/controllers/groups/application_controller.rb

 class Groups::ApplicationController < ApplicationController
-  before_action :set_title
+  layout 'group'
   private
   
@@ -18,10 +18,4 @@ class Groups::ApplicationController < ApplicationController
       return render_404
     end
   end
-
-  def set_title
-    @title      = group.name
-    @title_url  = group_path(group)
-    @sidebar    = "group"
-  end
 end

app/controllers/groups_controller.rb

@@ -12,6 +12,8 @@ class GroupsController < Groups::ApplicationController
   before_action :load_projects, except: [:new, :create, :projects, :edit, :update]
   before_action :event_filter, only: :show
+  layout :determine_layout
+
   def new
     @group = Group.new
   end
@@ -116,11 +118,11 @@ class GroupsController < Groups::ApplicationController
     end
   end
-  def set_title
+  def determine_layout
     if [:new, :create].include?(action_name.to_sym)
-      @title = 'New Group'
+      'application'
     else
-      super
+      'group'
     end
   end

app/controllers/help_controller.rb

 class HelpController < ApplicationController
-  before_action :set_title
+  layout 'help'
   def index
   end
@@ -46,11 +46,6 @@ class HelpController < ApplicationController
   private
-  def set_title
-    @title      = "Help"
-    @title_url  = help_path
-  end
-
   def path_params
     params.require(:category)
     params.require(:file)

app/controllers/oauth/applications_controller.rb

 class Oauth::ApplicationsController < Doorkeeper::ApplicationsController
+  include PageLayoutHelper
+  
   before_action :authenticate_user!
-  before_action :set_title
+
+  layout 'profile'
   def index
     head :forbidden and return
@@ -36,10 +39,4 @@ class Oauth::ApplicationsController < Doorkeeper::ApplicationsController
   rescue_from ActiveRecord::RecordNotFound do |exception|
     render "errors/not_found", layout: "errors", status: 404
   end
-
-  def set_title
-    @title      = "Profile"
-    @title_url  = profile_path
-    @sidebar    = "profile"
-  end
 end

app/controllers/oauth/authorizations_controller.rb

 class Oauth::AuthorizationsController < Doorkeeper::AuthorizationsController
   before_action :authenticate_resource_owner!
-  before_action :set_title
+
+  layout 'profile'
   def new
     if pre_auth.authorizable?
@@ -54,10 +55,4 @@ class Oauth::AuthorizationsController < Doorkeeper::AuthorizationsController
   def strategy
     @strategy ||= server.authorization_request(pre_auth.response_type)
   end
-  
-  def set_title
-    @title      = "Profile"
-    @title_url  = profile_path
-    @sidebar    = "profile"
-  end
 end

app/controllers/oauth/authorized_applications_controller.rb

 class Oauth::AuthorizedApplicationsController < Doorkeeper::AuthorizedApplicationsController
-  before_action :set_title
+  include PageLayoutHelper
+
+  layout 'profile'
   def destroy
     Doorkeeper::AccessToken.revoke_all_for(params[:id], current_resource_owner)
     redirect_to applications_profile_url, notice: I18n.t(:notice, scope: [:doorkeeper, :flash, :authorized_applications, :destroy])
   end
-
-  private
-  
-  def set_title
-    @title      = "Profile"
-    @title_url  = profile_path
-    @sidebar    = "profile"
-  end
 end

app/controllers/profiles/application_controller.rb

 class Profiles::ApplicationController < ApplicationController
-  before_action :set_title
-
-  private
-
-  def set_title
-    @title      = "Profile"
-    @title_url  = profile_path
-    @sidebar    = "profile"
-  end
+  layout 'profile'
 end

app/controllers/profiles/passwords_controller.rb

@@ -2,9 +2,10 @@ class Profiles::PasswordsController < Profiles::ApplicationController
   skip_before_action :check_password_expiration, only: [:new, :create]
   before_action :set_user
-  before_action :set_title
   before_action :authorize_change_password!
+  layout :determine_layout
+
   def new
   end
@@ -64,11 +65,11 @@ class Profiles::PasswordsController < Profiles::ApplicationController
     @user = current_user
   end
-  def set_title
+  def determine_layout
     if [:new, :create].include?(action_name.to_sym)
-      @title = "New password"
+      'application'
     else
-      super
+      'profile'
     end
   end

app/controllers/projects_controller.rb

@@ -6,7 +6,6 @@ class ProjectsController < ApplicationController
   # Authorize
   before_action :authorize_admin_project!, only: [:edit, :update, :destroy, :transfer, :archive, :unarchive]
-  before_action :set_title, only: [:new, :create]
   before_action :event_filter, only: :show
   layout :determine_layout
@@ -160,10 +159,6 @@ class ProjectsController < ApplicationController
   private
-  def set_title
-    @title = 'New Project'
-  end
-
   def determine_layout
     if [:new, :create].include?(action_name.to_sym)
       'application'

app/controllers/search_controller.rb

 class SearchController < ApplicationController
   include SearchHelper
-  before_action :set_title
+  layout 'search'
   def show
     return if params[:search].nil? || params[:search].blank?
@@ -57,11 +57,4 @@ class SearchController < ApplicationController
     render json: search_autocomplete_opts(term).to_json
   end
-
-  private
-
-  def set_title
-    @title      = "Search"
-    @title_url  = search_path
-  end
 end

app/controllers/snippets_controller.rb

@@ -7,10 +7,9 @@ class SnippetsController < ApplicationController
   # Allow destroy snippet
   before_action :authorize_admin_snippet!, only: [:destroy]
-  before_action :set_title
-
   skip_before_action :authenticate_user!, only: [:index, :user_index, :show, :raw]
+  layout 'snippets'
   respond_to :html
   def index
@@ -96,12 +95,6 @@ class SnippetsController < ApplicationController
     return render_404 unless can?(current_user, :admin_personal_snippet, @snippet)
   end
-  def set_title
-    @title      = 'Snippets'
-    @title_url  = snippets_path
-    @sidebar    = "snippets"
-  end
-
   def snippet_params
     params.require(:personal_snippet).permit(:title, :content, :file_name, :private, :visibility_level)
   end

app/helpers/application_helper.rb

@@ -332,12 +332,4 @@ module ApplicationHelper
       end
     "#{entity_title}#{count}"
   end
-
-  def page_title(*titles)
-    @page_title ||= []
-
-    @page_title.push(*titles.compact) if titles.any?
-
-    @page_title.join(" | ")
-  end
 end

app/helpers/page_layout_helper.rb

+module PageLayoutHelper
+  def page_title(*titles)
+    @page_title ||= []
+
+    @page_title.push(*titles.compact) if titles.any?
+
+    @page_title.join(" | ")
+  end
+
+  def header_title(title = nil, title_url = nil)
+    if title
+      @header_title     = title
+      @header_title_url = title_url
+    else
+      @header_title_url ? link_to(@header_title, @header_title_url) : @header_title
+    end
+  end
+
+  def sidebar(name = nil)
+    if name
+      @sidebar = name
+    else
+      @sidebar
+    end
+  end
+end

app/views/groups/new.html.haml

+- page_title    'New Group'
+- header_title  'New Group'
 = form_for @group, html: { class: 'group-form form-horizontal' } do |f|
   - if @group.errors.any?
     .alert.alert-danger

app/views/layouts/admin.html.haml

+- page_title    "Admin area"
+- header_title  "Admin area", admin_root_path
+- sidebar       "admin"
+
+= render template: "layouts/application"